131033994 has 128 divisors (see below), whose sum is σ = 359976960. Its totient is φ = 30772224.

The previous prime is 131033971. The next prime is 131033999. The reversal of 131033994 is 499330131.

It is not an unprimeable number, because it can be changed into a prime (131033999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 175987 + ... + 176729.

It is an arithmetic number, because the mean of its divisors is an integer number (2812320).

Almost surely, 2^131033994 is an apocalyptic number.

131033994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131033994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179988480).

131033994 is an abundant number, since it is smaller than the sum of its proper divisors (228942966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131033994 is a wasteful number, since it uses less digits than its factorization.

131033994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 131033994 is about 11447.0080807170. The cubic root of 131033994 is about 507.9192345819.

The spelling of 131033994 in words is "one hundred thirty-one million, thirty-three thousand, nine hundred ninety-four".